Ultraviolet Flashcards
easy ra kaayu ni
UVA wavelength(long wavelength)
315-400
UBV wavelength(medium wavelength)
280-315
UVC wavelength(short wavelength)
100-280
How do tanning beds work
It emits UVA to stimulate your skin to produce melanin, causing you to tan.
It acts like a mini sun.
Does UVA pass through the ozone layer?
How much?
Yes.
95%
Does UVB pass through the ozone layer?
Partially.
Does UVC pass through the ozone layer?
No.
Who discovered UV
Johann Wilhelm Ritter
When was UV discovered
Febuary 22, 1801
Explain how he discovered UV
He directed sunlight through a glass prism to create a spectrum. He then placed silver chloride in each color of the spectrum. He noticed that the silver chloride showed little change in the red part of the spectrum, but increasingly darkened toward the violet end of the spectrum.
What is phosphor
Phosphor is a solid material that emits light, or luminesces, when exposed to radiation
What sunscreen should you get
Broad spectrum, spf 50+
